Reenforced-concrete column



Jan. 2l, 1930. (B. BAUER 5 REENFORCED CONCRETE COLUMN Filed Sept. 10,1927 -4 by h-a W Id Md 2mm 1- H Brzuno A K INVENTOR Patented Jan. '21,1930 f 1,744,065 it PATENT OFFIQE BRUNO BAUER, on VIENNA, AUSTRIAREENFORGED-CONORETE COLUMN Application filed September 10, 1927, SerialNo.218,637, and in, Austria July 20, 1927.

This invention relates to a method of producing braced reenforcedconcrete columns and to improved columns so produced. The

essential feature of the method according to the present inventionconsists in the employment of a unitary work piece, which com prises aniron core, a column head, a bracing member, a shell and a plastercarrier. The work piece can be fitted together ready for use in'thefoundry and thereafter carted to the place of erection. It can bereadily used as support or standard and concreting can be carried outimmediately without the necessity of employing the generally usedauxiliary means for the production of reenforced concrete columns.

Several modes of carrying out the present invention are illustrated byway of example on the accompanying sheet of drawings, in

2 which-- Figs. 1 and 2 show a work piece in longitudinal section andcross section respectively.

Figs. 3 and 4 illustrate a modified construction of the work piece inelevation and cross section respectively.

Fig. 5 shows in an enlarged scale the arrangement of the wire bracingmember and the shell formed of corrugated sheet iron.

Fig. 6 illustrates diagrammatically another ;construction of a part ofthe work piece according to the present invention.

The work piece consists of an iron core of any convenient shape, whichcomprises four straps a, as shown in Figs. 1 and 2, or eight straps a,as illustrated in Figs. .3 and 4. On the iron core are slippedshell-supports, for instance annular or ring-shaped discs of sheet ironor the like, which determinethe strength of the concrete column. Inorder to enable the slipping on of the discs, the iron coreis providedwith inwardly bent flanges b. In the illustration embodiments, theflanges are disposed only at the bottom end of the iron core, so thatthe discs can he slipped 011 from the bottom end.

In the construction shown in Fig. 6, the shell-support is formed byvirtue of the fact that a sheet ironstrip 0, facing with its narrow sidethe iron core, is wound round the latter in screw-shaped windings.

Preferably corrugated sheet iron is used for the shell. The corrugatedsheet iron may be Wound round the iron core either in the shape ofstrips, or corrugated sheet iron plates may be employed. In order todispose the bracing wires in the groves of the corrugated sheet iron,the said grooves preferably extend at an incline, so that the same formscrew-lines after the bracing of the iron core. The inclined positioningof the grooves is attained by virtue of the fact that the corrugatedsheet iron plates are cut at an incline or that the edges arecorrespondingly displaced with respect to one another.

In the construction shown in Figs. 3 and 4, large corrugated sheet ironplates cl are employed, which if desired extend over the whole height ofthe iron core. The wirewinding e passes in such amanner, that the wirerests in each groove.

In the construction shown in Figs. 1 and 2, two bracings are employed,one bracing resting at the outside in the grooves of the corrugatedsheet iron, while the other inner bracing rests tightly against thestraps forming the iron core and extend in a straight line between thesame.

As shown in Fig. 5, the corrugated sheet iron is provided with holes g,inorder that during the concreting the air may escape and 5 the raisedparts of the corrugated sheet iron may be" completely filled outwithconcrete, the said holes also facilitating the drying of the concrete. 1

The holes in the corrugated sheet iron may 35 be formed by punching, sothat the edges of. the holes are Jagged (Fig. 5) and serve for carryingtheplaster. I i

In order to provide for an axial adjustmerit of a number of superposedcolumns, the 0 flanges b are furnished with projections h, which engagesuitably shaped recesses 71 of the superposed column.

The end In of the column is provided with slots Z which are open at thetop, in order to permit the insertion of the reenforcing bars for thebeam from the top.

This construction possesses the further advantage, that the usualseparate columnhead, provided with a coping and lateral openings for thepulling through of the reenforcing bars, are dispensed with.

As shown in Figs. 1 and 3 of the drawing, the iron core is furnished atits upper end with consols m, which serve as a rest for the shell of theroof construction.

I claim:

1. A work piece for a reenforced. concrete column comprising an ironcore, shell supporting members carried by said core, a shell encasingsaid core and resting on said supporting members and bracing wiresencasing said shell and retained in a definite position by said shell.

2. A work piece for a reenforced concrete column comprising an iron coremade up of a plurality of iron straps arranged in spaced relation andbraced against lateral stress by bracing wires wound thereupon. shellsupporting members carried by said core, a shell encasing said core andresting on said supporting members and bracing wires encasing said shelland retained in a definite position by said shell.

3. A work piece for a reenforced concrete column comprising an ironcore, discs carried by said iron core for supporting a shell, a shellencasing said core and resting on the peripheries of said discs, bracingwires encasing said shell, means on said shell for retaining said wiresin a definite position and further means on said shell for retaining plaster.

4. A work piece for a reenforced concrete column comprising an ironcore, shell supporting means carried by said core, a shell encasing saidcore, a helical track formed on said shell, bracing wires resting insaid helical track and outwardly protruding fingers on said shell forretaining plaster.

5. A work piece for a reenforced concrete column comprising an ironcore, shell supporting means carried by said core, a shell encasing saidcore made up of diagonally corrugated sheet metal, bracing wiresretained by the corrugations of said shell and struck-out fingers onsaidshell for retaining plaster.

6. In a work piece for a reenforced con crete column, an iron core madeup of a plurality of iron straps in spaced relation, the

lower ends of said straps, having recessed portions and the upper endsof said straps,

having protruding portions to mate said re- DR. BRUNO BAUER.

